<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="title" @keyup.enter="add"/>
    </div>
</template>

<script>
    import {nanoid} from 'nanoid';

    export default {
        //注意不管是你写的data也还还是methods也好，甚至是computed计算属性也好都会出现在组件事例对象vc身上
        //属性值不能重名
        name: "MyHeader",
        methods: {
            add() {
                //将用户的输入包装成一个todo对象
                console.log(this.title)
                if (!this.title.trim()) {
                    alert('代办事项不能为空')
                    return; //输入的代办事项为空则不走下面流程
                }
                const todoObj = {
                    id: nanoid(),
                    title: this.title,
                    done: false
                }
                // console.log(todoObj);
                this.addTodo(todoObj)
                this.title = '';
            }
        },
        props: ['addTodo'],
    }
</script>

<style scoped>
    /*header*/
    .todo-header input {
        width: 560px;
        height: 28px;
        font-size: 14px;
        border: 1px solid #ccc;
        border-radius: 4px;
        padding: 4px 7px;
    }

    .todo-header input:focus {
        outline: none;
        border-color: rgba(82, 168, 236, 0.8);
        box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
    }
</style>
